Cadillac 2008 CTS - Manual (Page 122)

If you still are unable to shift out of PARK (P):
1. Fully release the shift lever button.
2. While holding down the brake pedal, press the shift
lever button again.
3. Move the shift lever to the desired position.
If you still cannot move the shift lever from PARK (P),
consult your dealer/retailer or a professional towing
service.
Parking Your Vehicle (Manual
Transmission)
Before you get out of your vehicle, place the shift lever
in REVERSE (R) and firmly apply the parking brake.
For the base ignition, turn the ignition key to OFF/LOCK,
press the release button and remove the key. See
“Key Release Button” under Ignition Positions (Key
Access) on page 2-31 or Ignition Positions (Keyless
Access) on page 2-33 for more information.
For the keyless access ignition, turn the ignition to
LOCK/OFF and remove the keyless access transmitter.
If you are towing a trailer, see Towing a Trailer on
page 4-29.
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